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BetaBuilders MSCI US REIT ETF Average Annual Total Returns
12 Months Ended 60 Months Ended 91 Months Ended
Feb. 28, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
MSCI USA INDEX(Reflects No Deduction for Fees, Expenses, or Taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   17.75% 13.87% 14.50%
MSCI US REIT CUSTOM CAPPED INDEX(Reflects No Deduction for Fees, Expenses, or Taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   1.97% 6.36% 5.91%
ETF        
Prospectus [Line Items]        
Average Annual Return, Percent   1.86% 6.23% 5.78%
Performance Inception Date Jun. 15, 2018      
ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   0.77% 5.14% 4.68%
ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   1.32% 4.47% 4.12%